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1402 HRV Not Interlocked with Furnace Fan - Insulation Energy Efficiency - Ventilation
 
1402 HRV Not Interlocked with Furnace Fan - Insulation Energy Efficiency - Ventilation -

Image Text: If the furnace fan is not running when the HRV (Heat Recovery Ventilator) is on, the airflow can short circuit in the cold air return > cutaway showing inside of cold air return > AIRFLOW > cold air return > exhaust > fresh air > HRV (Heat Recovery Ventilator) > when the HRV is on, the furnace fan should operate on low speed (if it is a multiple speed blower) > when the HRV switches to high speed (house ventilation setting) the furnace fan should also switch to high speed > cold-side ducts > gas furnace

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INSULATION

The Basics, Air/Vapor Barriers (Vapor Retarders), Venting Roofs, Venting Living Spaces, Attics, Flat and Cathedral Roofs, Walls Above Grade, Basements and Crawlspaces, Floors over Unheated Areas, Ventilation Systems

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